Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 27
   4 EXTRAVERSION = -rc2
   5 NAME = Rotary Wombat
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not:
  14 # o  use make's built-in rules and variables
  15 #    (this increases performance and avoids hard-to-debug behaviour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into vmlinux), we will call a sub make in that other dir, and
  27 # after that we are sure that everything which is in that other dir
  28 # is now up to date.
  29 #
  30 # The only cases where we need to modify files which have global
  31 # effects are thus separated out and done before the recursive
  32 # descending is started. They are now explicitly listed as the
  33 # prepare rule.
  34
  35 # To put more focus on warnings, be less verbose as default
  36 # Use 'make V=1' to see the full commands
  37
  38 ifdef V
  39   ifeq ("$(origin V)", "command line")
  40     KBUILD_VERBOSE = $(V)
  41   endif
  42 endif
  43 ifndef KBUILD_VERBOSE
  44   KBUILD_VERBOSE = 0
  45 endif
  46
  47 # Call a source code checker (by default, "sparse") as part of the
  48 # C compilation.
  49 #
  50 # Use 'make C=1' to enable checking of only re-compiled files.
  51 # Use 'make C=2' to enable checking of *all* source files, regardless
  52 # of whether they are re-compiled or not.
  53 #
  54 # See the file "Documentation/sparse.txt" for more details, including
  55 # where to get the "sparse" utility.
  56
  57 ifdef C
  58   ifeq ("$(origin C)", "command line")
  59     KBUILD_CHECKSRC = $(C)
  60   endif
  61 endif
  62 ifndef KBUILD_CHECKSRC
  63   KBUILD_CHECKSRC = 0
  64 endif
  65
  66 # Use make M=dir to specify directory of external module to build
  67 # Old syntax make ... SUBDIRS=$PWD is still supported
  68 # Setting the environment variable KBUILD_EXTMOD take precedence
  69 ifdef SUBDIRS
  70   KBUILD_EXTMOD ?= $(SUBDIRS)
  71 endif
  72 ifdef M
  73   ifeq ("$(origin M)", "command line")
  74     KBUILD_EXTMOD := $(M)
  75   endif
  76 endif
  77
  78
  79 # kbuild supports saving output files in a separate directory.
  80 # To locate output files in a separate directory two syntaxes are supported.
  81 # In both cases the working directory must be the root of the kernel src.
  82 # 1) O=
  83 # Use "make O=dir/to/store/output/files/"
  84 #
  85 # 2) Set KBUILD_OUTPUT
  86 # Set the environment variable KBUILD_OUTPUT to point to the directory
  87 # where the output files shall be placed.
  88 # export KBUILD_OUTPUT=dir/to/store/output/files/
  89 # make
  90 #
  91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  92 # variable.
  93
  94
  95 # KBUILD_SRC is set on invocation of make in OBJ directory
  96 # KBUILD_SRC is not intended to be used by the regular user (for now)
  97 ifeq ($(KBUILD_SRC),)
  98
  99 # OK, Make called in directory where kernel src resides
 100 # Do we want to locate output files in a separate directory?
 101 ifdef O
 102   ifeq ("$(origin O)", "command line")
 103     KBUILD_OUTPUT := $(O)
 104   endif
 105 endif
 106
 107 # That's our default target when none is given on the command line
 108 PHONY := _all
 109 _all:
 110
 111 # Cancel implicit rules on top Makefile
 112 $(CURDIR)/Makefile Makefile: ;
 113
 114 ifneq ($(KBUILD_OUTPUT),)
 115 # Invoke a second make in the output directory, passing relevant variables
 116 # check that the output directory actually exists
 117 saved-output := $(KBUILD_OUTPUT)
 118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 119 $(if $(KBUILD_OUTPUT),, \
 120      $(error output directory "$(saved-output)" does not exist))
 121
 122 PHONY += $(MAKECMDGOALS) sub-make
 123
 124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 125         $(Q)@:
 126
 127 sub-make: FORCE
 128         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 129         KBUILD_SRC=$(CURDIR) \
 130         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
 131         $(filter-out _all sub-make,$(MAKECMDGOALS))
 132
 133 # Leave processing to above invocation of make
 134 skip-makefile := 1
 135 endif # ifneq ($(KBUILD_OUTPUT),)
 136 endif # ifeq ($(KBUILD_SRC),)
 137
 138 # We process the rest of the Makefile if this is the final invocation of make
 139 ifeq ($(skip-makefile),)
 140
 141 # If building an external module we do not care about the all: rule
 142 # but instead _all depend on modules
 143 PHONY += all
 144 ifeq ($(KBUILD_EXTMOD),)
 145 _all: all
 146 else
 147 _all: modules
 148 endif
 149
 150 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 151 TOPDIR          := $(srctree)
 152 # FIXME - TOPDIR is obsolete, use srctree/objtree
 153 objtree         := $(CURDIR)
 154 src             := $(srctree)
 155 obj             := $(objtree)
 156
 157 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 158
 159 export srctree objtree VPATH TOPDIR
 160
 161
 162 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 163 # first, and if a usermode build is happening, the "ARCH=um" on the command
 164 # line overrides the setting of ARCH below.  If a native build is happening,
 165 # then ARCH is assigned, getting whatever value it gets normally, and
 166 # SUBARCH is subsequently ignored.
 167
 168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 169                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 170                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 171                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 172                                   -e s/sh.*/sh/ )
 173
 174 # Cross compiling and selecting different set of gcc/bin-utils
 175 # ---------------------------------------------------------------------------
 176 #
 177 # When performing cross compilation for other architectures ARCH shall be set
 178 # to the target architecture. (See arch/* for the possibilities).
 179 # ARCH can be set during invocation of make:
 180 # make ARCH=ia64
 181 # Another way is to have ARCH set in the environment.
 182 # The default ARCH is the host where make is executed.
 183
 184 # CROSS_COMPILE specify the prefix used for all executables used
 185 # during compilation. Only gcc and related bin-utils executables
 186 # are prefixed with $(CROSS_COMPILE).
 187 # CROSS_COMPILE can be set on the command line
 188 # make CROSS_COMPILE=ia64-linux-
 189 # Alternatively CROSS_COMPILE can be set in the environment.
 190 # Default value for CROSS_COMPILE is not to prefix executables
 191 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 192 export KBUILD_BUILDHOST := $(SUBARCH)
 193 ARCH            ?= $(SUBARCH)
 194 CROSS_COMPILE   ?=
 195
 196 # Architecture as present in compile.h
 197 UTS_MACHINE     := $(ARCH)
 198 SRCARCH         := $(ARCH)
 199
 200 # Additional ARCH settings for x86
 201 ifeq ($(ARCH),i386)
 202         SRCARCH := x86
 203 endif
 204 ifeq ($(ARCH),x86_64)
 205         SRCARCH := x86
 206 endif
 207
 208 # Where to locate arch specific headers
 209 ifeq ($(ARCH),sparc64)
 210        hdr-arch  := sparc
 211 else
 212        hdr-arch  := $(SRCARCH)
 213 endif
 214
 215 KCONFIG_CONFIG  ?= .config
 216
 217 # SHELL used by kbuild
 218 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 219           else if [ -x /bin/bash ]; then echo /bin/bash; \
 220           else echo sh; fi ; fi)
 221
 222 HOSTCC       = gcc
 223 HOSTCXX      = g++
 224 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 225 HOSTCXXFLAGS = -O2
 226
 227 # Decide whether to build built-in, modular, or both.
 228 # Normally, just do built-in.
 229
 230 KBUILD_MODULES :=
 231 KBUILD_BUILTIN := 1
 232
 233 #       If we have only "make modules", don't compile built-in objects.
 234 #       When we're building modules with modversions, we need to consider
 235 #       the built-in objects during the descend as well, in order to
 236 #       make sure the checksums are up to date before we record them.
 237
 238 ifeq ($(MAKECMDGOALS),modules)
 239   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 240 endif
 241
 242 #       If we have "make <whatever> modules", compile modules
 243 #       in addition to whatever we do anyway.
 244 #       Just "make" or "make all" shall build modules as well
 245
 246 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 247   KBUILD_MODULES := 1
 248 endif
 249
 250 ifeq ($(MAKECMDGOALS),)
 251   KBUILD_MODULES := 1
 252 endif
 253
 254 export KBUILD_MODULES KBUILD_BUILTIN
 255 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 256
 257 # Beautify output
 258 # ---------------------------------------------------------------------------
 259 #
 260 # Normally, we echo the whole command before executing it. By making
 261 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 262 # $(quiet) to choose other forms of output instead, e.g.
 263 #
 264 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 265 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 266 #
 267 # If $(quiet) is empty, the whole command will be printed.
 268 # If it is set to "quiet_", only the short version will be printed.
 269 # If it is set to "silent_", nothing will be printed at all, since
 270 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 271 #
 272 # A simple variant is to prefix commands with $(Q) - that's useful
 273 # for commands that shall be hidden in non-verbose mode.
 274 #
 275 #       $(Q)ln $@ :<
 276 #
 277 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 278 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 279
 280 ifeq ($(KBUILD_VERBOSE),1)
 281   quiet =
 282   Q =
 283 else
 284   quiet=quiet_
 285   Q = @
 286 endif
 287
 288 # If the user is running make -s (silent mode), suppress echoing of
 289 # commands
 290
 291 ifneq ($(findstring s,$(MAKEFLAGS)),)
 292   quiet=silent_
 293 endif
 294
 295 export quiet Q KBUILD_VERBOSE
 296
 297
 298 # Look for make include files relative to root of kernel src
 299 MAKEFLAGS += --include-dir=$(srctree)
 300
 301 # We need some generic definitions (do not try to remake the file).
 302 $(srctree)/scripts/Kbuild.include: ;
 303 include $(srctree)/scripts/Kbuild.include
 304
 305 # Make variables (CC, etc...)
 306
 307 AS              = $(CROSS_COMPILE)as
 308 LD              = $(CROSS_COMPILE)ld
 309 CC              = $(CROSS_COMPILE)gcc
 310 CPP             = $(CC) -E
 311 AR              = $(CROSS_COMPILE)ar
 312 NM              = $(CROSS_COMPILE)nm
 313 STRIP           = $(CROSS_COMPILE)strip
 314 OBJCOPY         = $(CROSS_COMPILE)objcopy
 315 OBJDUMP         = $(CROSS_COMPILE)objdump
 316 AWK             = awk
 317 GENKSYMS        = scripts/genksyms/genksyms
 318 DEPMOD          = /sbin/depmod
 319 KALLSYMS        = scripts/kallsyms
 320 PERL            = perl
 321 CHECK           = sparse
 322
 323 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 324 MODFLAGS        = -DMODULE
 325 CFLAGS_MODULE   = $(MODFLAGS)
 326 AFLAGS_MODULE   = $(MODFLAGS)
 327 LDFLAGS_MODULE  =
 328 CFLAGS_KERNEL   =
 329 AFLAGS_KERNEL   =
 330
 331
 332 # Use LINUXINCLUDE when you must reference the include/ directory.
 333 # Needed to be compatible with the O= option
 334 LINUXINCLUDE    := -Iinclude \
 335                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 336                    -I$(srctree)/arch/$(hdr-arch)/include               \
 337                    -include include/linux/autoconf.h
 338
 339 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
 340
 341 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 342                    -fno-strict-aliasing -fno-common \
 343                    -Werror-implicit-function-declaration
 344 KBUILD_AFLAGS   := -D__ASSEMBLY__
 345
 346 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 347 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 348 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 349
 350 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 351 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 352 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 353 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 354
 355 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 356 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 357 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 358
 359 # When compiling out-of-tree modules, put MODVERDIR in the module
 360 # tree rather than in the kernel tree. The kernel tree might
 361 # even be read-only.
 362 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 363
 364 # Files to ignore in find ... statements
 365
 366 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 367 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 368
 369 # ===========================================================================
 370 # Rules shared between *config targets and build targets
 371
 372 # Basic helpers built in scripts/
 373 PHONY += scripts_basic
 374 scripts_basic:
 375         $(Q)$(MAKE) $(build)=scripts/basic
 376
 377 # To avoid any implicit rule to kick in, define an empty command.
 378 scripts/basic/%: scripts_basic ;
 379
 380 PHONY += outputmakefile
 381 # outputmakefile generates a Makefile in the output directory, if using a
 382 # separate output directory. This allows convenient use of make in the
 383 # output directory.
 384 outputmakefile:
 385 ifneq ($(KBUILD_SRC),)
 386         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 387             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 388 endif
 389
 390 # To make sure we do not include .config for any of the *config targets
 391 # catch them early, and hand them over to scripts/kconfig/Makefile
 392 # It is allowed to specify more targets when calling make, including
 393 # mixing *config targets and build targets.
 394 # For example 'make oldconfig all'.
 395 # Detect when mixed targets is specified, and make a second invocation
 396 # of make so .config is not included in this case either (for *config).
 397
 398 no-dot-config-targets := clean mrproper distclean \
 399                          cscope TAGS tags help %docs check% \
 400                          include/linux/version.h headers_% \
 401                          kernelrelease kernelversion
 402
 403 config-targets := 0
 404 mixed-targets  := 0
 405 dot-config     := 1
 406
 407 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 408         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 409                 dot-config := 0
 410         endif
 411 endif
 412
 413 ifeq ($(KBUILD_EXTMOD),)
 414         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 415                 config-targets := 1
 416                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 417                         mixed-targets := 1
 418                 endif
 419         endif
 420 endif
 421
 422 ifeq ($(mixed-targets),1)
 423 # ===========================================================================
 424 # We're called with mixed targets (*config and build targets).
 425 # Handle them one by one.
 426
 427 %:: FORCE
 428         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 429
 430 else
 431 ifeq ($(config-targets),1)
 432 # ===========================================================================
 433 # *config targets only - make sure prerequisites are updated, and descend
 434 # in scripts/kconfig to make the *config target
 435
 436 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 437 # KBUILD_DEFCONFIG may point out an alternative default configuration
 438 # used for 'make defconfig'
 439 include $(srctree)/arch/$(SRCARCH)/Makefile
 440 export KBUILD_DEFCONFIG
 441
 442 config %config: scripts_basic outputmakefile FORCE
 443         $(Q)mkdir -p include/linux include/config
 444         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 445
 446 else
 447 # ===========================================================================
 448 # Build targets only - this includes vmlinux, arch specific targets, clean
 449 # targets and others. In general all targets except *config targets.
 450
 451 ifeq ($(KBUILD_EXTMOD),)
 452 # Additional helpers built in scripts/
 453 # Carefully list dependencies so we do not try to build scripts twice
 454 # in parallel
 455 PHONY += scripts
 456 scripts: scripts_basic include/config/auto.conf
 457         $(Q)$(MAKE) $(build)=$(@)
 458
 459 # Objects we will link into vmlinux / subdirs we need to visit
 460 init-y          := init/
 461 drivers-y       := drivers/ sound/ firmware/
 462 net-y           := net/
 463 libs-y          := lib/
 464 core-y          := usr/
 465 endif # KBUILD_EXTMOD
 466
 467 ifeq ($(dot-config),1)
 468 # Read in config
 469 -include include/config/auto.conf
 470
 471 ifeq ($(KBUILD_EXTMOD),)
 472 # Read in dependencies to all Kconfig* files, make sure to run
 473 # oldconfig if changes are detected.
 474 -include include/config/auto.conf.cmd
 475
 476 # To avoid any implicit rule to kick in, define an empty command
 477 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 478
 479 # If .config is newer than include/config/auto.conf, someone tinkered
 480 # with it and forgot to run make oldconfig.
 481 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 482 # we execute the config step to be sure to catch updated Kconfig files
 483 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 484         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 485 else
 486 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 487 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 488 PHONY += include/config/auto.conf
 489
 490 include/config/auto.conf:
 491         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 492         echo;                                                           \
 493         echo "  ERROR: Kernel configuration is invalid.";               \
 494         echo "         include/linux/autoconf.h or $@ are missing.";    \
 495         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 496         echo;                                                           \
 497         /bin/false)
 498
 499 endif # KBUILD_EXTMOD
 500
 501 else
 502 # Dummy target needed, because used as prerequisite
 503 include/config/auto.conf: ;
 504 endif # $(dot-config)
 505
 506 # The all: target is the default when no target is given on the
 507 # command line.
 508 # This allow a user to issue only 'make' to build a kernel including modules
 509 # Defaults vmlinux but it is usually overridden in the arch makefile
 510 all: vmlinux
 511
 512 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 513 KBUILD_CFLAGS   += -Os
 514 else
 515 KBUILD_CFLAGS   += -O2
 516 endif
 517
 518 include $(srctree)/arch/$(SRCARCH)/Makefile
 519
 520 ifneq (CONFIG_FRAME_WARN,0)
 521 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 522 endif
 523
 524 # Force gcc to behave correct even for buggy distributions
 525 # Arch Makefiles may override this setting
 526 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 527
 528 ifdef CONFIG_FRAME_POINTER
 529 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 530 else
 531 KBUILD_CFLAGS   += -fomit-frame-pointer
 532 endif
 533
 534 ifdef CONFIG_DEBUG_INFO
 535 KBUILD_CFLAGS   += -g
 536 KBUILD_AFLAGS   += -gdwarf-2
 537 endif
 538
 539 ifdef CONFIG_FTRACE
 540 KBUILD_CFLAGS   += -pg
 541 endif
 542
 543 # We trigger additional mismatches with less inlining
 544 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 545 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 546 endif
 547
 548 # arch Makefile may override CC so keep this after arch Makefile is included
 549 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 550 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 551
 552 # warn about C99 declaration after statement
 553 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 554
 555 # disable pointer signed / unsigned warnings in gcc 4.0
 556 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 557
 558 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 559 # But warn user when we do so
 560 warn-assign = \
 561 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 562
 563 ifneq ($(KCPPFLAGS),)
 564         $(call warn-assign,CPPFLAGS)
 565         KBUILD_CPPFLAGS += $(KCPPFLAGS)
 566 endif
 567 ifneq ($(KAFLAGS),)
 568         $(call warn-assign,AFLAGS)
 569         KBUILD_AFLAGS += $(KAFLAGS)
 570 endif
 571 ifneq ($(KCFLAGS),)
 572         $(call warn-assign,CFLAGS)
 573         KBUILD_CFLAGS += $(KCFLAGS)
 574 endif
 575
 576 # Use --build-id when available.
 577 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 578                               $(call ld-option, -Wl$(comma)--build-id,))
 579 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 580 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 581
 582 # Default kernel image to build when no specific target is given.
 583 # KBUILD_IMAGE may be overruled on the command line or
 584 # set in the environment
 585 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 586 # this default value
 587 export KBUILD_IMAGE ?= vmlinux
 588
 589 #
 590 # INSTALL_PATH specifies where to place the updated kernel and system map
 591 # images. Default is /boot, but you can set it to other values
 592 export  INSTALL_PATH ?= /boot
 593
 594 #
 595 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 596 # relocations required by build roots.  This is not defined in the
 597 # makefile but the argument can be passed to make if needed.
 598 #
 599
 600 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 601 export MODLIB
 602
 603 #
 604 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 605 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 606 #  the default option --strip-debug will be used.  Otherwise,
 607 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 608
 609 ifdef INSTALL_MOD_STRIP
 610 ifeq ($(INSTALL_MOD_STRIP),1)
 611 mod_strip_cmd = $(STRIP) --strip-debug
 612 else
 613 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 614 endif # INSTALL_MOD_STRIP=1
 615 else
 616 mod_strip_cmd = true
 617 endif # INSTALL_MOD_STRIP
 618 export mod_strip_cmd
 619
 620
 621 ifeq ($(KBUILD_EXTMOD),)
 622 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 623
 624 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 625                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 626                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 627
 628 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 629                      $(init-n) $(init-) \
 630                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 631                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 632
 633 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 634 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 635 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 636 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 637 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 638 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 639 libs-y          := $(libs-y1) $(libs-y2)
 640
 641 # Build vmlinux
 642 # ---------------------------------------------------------------------------
 643 # vmlinux is built from the objects selected by $(vmlinux-init) and
 644 # $(vmlinux-main). Most are built-in.o files from top-level directories
 645 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 646 # Ordering when linking is important, and $(vmlinux-init) must be first.
 647 #
 648 # vmlinux
 649 #   ^
 650 #   |
 651 #   +-< $(vmlinux-init)
 652 #   |   +--< init/version.o + more
 653 #   |
 654 #   +--< $(vmlinux-main)
 655 #   |    +--< driver/built-in.o mm/built-in.o + more
 656 #   |
 657 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 658 #
 659 # vmlinux version (uname -v) cannot be updated during normal
 660 # descending-into-subdirs phase since we do not yet know if we need to
 661 # update vmlinux.
 662 # Therefore this step is delayed until just before final link of vmlinux -
 663 # except in the kallsyms case where it is done just before adding the
 664 # symbols to the kernel.
 665 #
 666 # System.map is generated to document addresses of all kernel symbols
 667
 668 vmlinux-init := $(head-y) $(init-y)
 669 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 670 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 671 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 672 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 673
 674 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 675 # May be overridden by arch/$(ARCH)/Makefile
 676 quiet_cmd_vmlinux__ ?= LD      $@
 677       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 678       -T $(vmlinux-lds) $(vmlinux-init)                          \
 679       --start-group $(vmlinux-main) --end-group                  \
 680       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 681
 682 # Generate new vmlinux version
 683 quiet_cmd_vmlinux_version = GEN     .version
 684       cmd_vmlinux_version = set -e;                     \
 685         if [ ! -r .version ]; then                      \
 686           rm -f .version;                               \
 687           echo 1 >.version;                             \
 688         else                                            \
 689           mv .version .old_version;                     \
 690           expr 0$$(cat .old_version) + 1 >.version;     \
 691         fi;                                             \
 692         $(MAKE) $(build)=init
 693
 694 # Generate System.map
 695 quiet_cmd_sysmap = SYSMAP
 696       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 697
 698 # Link of vmlinux
 699 # If CONFIG_KALLSYMS is set .version is already updated
 700 # Generate System.map and verify that the content is consistent
 701 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 702 # First command is ':' to allow us to use + in front of the rule
 703 define rule_vmlinux__
 704         :
 705         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 706
 707         $(call cmd,vmlinux__)
 708         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 709
 710         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 711           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 712         $(cmd_sysmap) $@ System.map;                                         \
 713         if [ $$? -ne 0 ]; then                                               \
 714                 rm -f $@;                                                    \
 715                 /bin/false;                                                  \
 716         fi;
 717         $(verify_kallsyms)
 718 endef
 719
 720
 721 ifdef CONFIG_KALLSYMS
 722 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 723 # It's a three stage process:
 724 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 725 #   empty
 726 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 727 #   the right size - vmlinux version (uname -v) is updated during this step
 728 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 729 #   but due to the added section, some addresses have shifted.
 730 #   From here, we generate a correct .tmp_kallsyms2.o
 731 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 732 # o Verify that the System.map from vmlinux matches the map from
 733 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 734 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 735 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 736 #   temporary bypass to allow the kernel to be built while the
 737 #   maintainers work out what went wrong with kallsyms.
 738
 739 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 740 last_kallsyms := 3
 741 else
 742 last_kallsyms := 2
 743 endif
 744
 745 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 746
 747 define verify_kallsyms
 748         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 749           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 750           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 751         $(Q)cmp -s System.map .tmp_System.map ||                             \
 752                 (echo Inconsistent kallsyms data;                            \
 753                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 754                  rm .tmp_kallsyms* ; /bin/false )
 755 endef
 756
 757 # Update vmlinux version before link
 758 # Use + in front of this rule to silent warning about make -j1
 759 # First command is ':' to allow us to use + in front of this rule
 760 cmd_ksym_ld = $(cmd_vmlinux__)
 761 define rule_ksym_ld
 762         :
 763         +$(call cmd,vmlinux_version)
 764         $(call cmd,vmlinux__)
 765         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 766 endef
 767
 768 # Generate .S file with all kernel symbols
 769 quiet_cmd_kallsyms = KSYM    $@
 770       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 771                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 772
 773 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 774         $(call if_changed_dep,as_o_S)
 775
 776 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 777         $(call cmd,kallsyms)
 778
 779 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 780 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 781         $(call if_changed_rule,ksym_ld)
 782
 783 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 784         $(call if_changed,vmlinux__)
 785
 786 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 787         $(call if_changed,vmlinux__)
 788
 789 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 790 $(KALLSYMS): scripts ;
 791
 792 # Generate some data for debugging strange kallsyms problems
 793 debug_kallsyms: .tmp_map$(last_kallsyms)
 794
 795 .tmp_map%: .tmp_vmlinux% FORCE
 796         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 797
 798 .tmp_map3: .tmp_map2
 799
 800 .tmp_map2: .tmp_map1
 801
 802 endif # ifdef CONFIG_KALLSYMS
 803
 804 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 805 # relevant sections renamed as per the linker script.
 806 quiet_cmd_vmlinux-modpost = LD      $@
 807       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 808          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 809          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 810 define rule_vmlinux-modpost
 811         :
 812         +$(call cmd,vmlinux-modpost)
 813         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 814         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 815 endef
 816
 817 # vmlinux image - including updated kernel symbols
 818 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 819 ifdef CONFIG_HEADERS_CHECK
 820         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 821 endif
 822 ifdef CONFIG_SAMPLES
 823         $(Q)$(MAKE) $(build)=samples
 824 endif
 825         $(call vmlinux-modpost)
 826         $(call if_changed_rule,vmlinux__)
 827         $(Q)rm -f .old_version
 828
 829 # build vmlinux.o first to catch section mismatch errors early
 830 ifdef CONFIG_KALLSYMS
 831 .tmp_vmlinux1: vmlinux.o
 832 endif
 833
 834 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 835 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 836         $(call if_changed_rule,vmlinux-modpost)
 837
 838 # The actual objects are generated when descending,
 839 # make sure no implicit rule kicks in
 840 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 841
 842 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 843 # Preset locale variables to speed up the build process. Limit locale
 844 # tweaks to this spot to avoid wrong language settings when running
 845 # make menuconfig etc.
 846 # Error messages still appears in the original language
 847
 848 PHONY += $(vmlinux-dirs)
 849 $(vmlinux-dirs): prepare scripts
 850         $(Q)$(MAKE) $(build)=$@
 851
 852 # Build the kernel release string
 853 #
 854 # The KERNELRELEASE value built here is stored in the file
 855 # include/config/kernel.release, and is used when executing several
 856 # make targets, such as "make install" or "make modules_install."
 857 #
 858 # The eventual kernel release string consists of the following fields,
 859 # shown in a hierarchical format to show how smaller parts are concatenated
 860 # to form the larger and final value, with values coming from places like
 861 # the Makefile, kernel config options, make command line options and/or
 862 # SCM tag information.
 863 #
 864 #       $(KERNELVERSION)
 865 #         $(VERSION)                    eg, 2
 866 #         $(PATCHLEVEL)                 eg, 6
 867 #         $(SUBLEVEL)                   eg, 18
 868 #         $(EXTRAVERSION)               eg, -rc6
 869 #       $(localver-full)
 870 #         $(localver)
 871 #           localversion*               (files without backups, containing '~')
 872 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 873 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 874 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 875 #           $(LOCALVERSION)             (from make command line if provided)
 876 #
 877 #  Note how the final $(localver-auto) string is included *only* if the
 878 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 879 # moment, only git is supported but other SCMs can edit the script
 880 # scripts/setlocalversion and add the appropriate checks as needed.
 881
 882 pattern = ".*/localversion[^~]*"
 883 string  = $(shell cat /dev/null \
 884            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 885
 886 localver = $(subst $(space),, $(string) \
 887                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 888
 889 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 890 # and if the SCM is know a tag from the SCM is appended.
 891 # The appended tag is determined by the SCM used.
 892 #
 893 # Currently, only git is supported.
 894 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 895 # checks as needed.
 896 ifdef CONFIG_LOCALVERSION_AUTO
 897         _localver-auto = $(shell $(CONFIG_SHELL) \
 898                           $(srctree)/scripts/setlocalversion $(srctree))
 899         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 900 endif
 901
 902 localver-full = $(localver)$(localver-auto)
 903
 904 # Store (new) KERNELRELASE string in include/config/kernel.release
 905 kernelrelease = $(KERNELVERSION)$(localver-full)
 906 include/config/kernel.release: include/config/auto.conf FORCE
 907         $(Q)rm -f $@
 908         $(Q)echo $(kernelrelease) > $@
 909
 910
 911 # Things we need to do before we recursively start building the kernel
 912 # or the modules are listed in "prepare".
 913 # A multi level approach is used. prepareN is processed before prepareN-1.
 914 # archprepare is used in arch Makefiles and when processed asm symlink,
 915 # version.h and scripts_basic is processed / created.
 916
 917 # Listed in dependency order
 918 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 919
 920 # prepare3 is used to check if we are building in a separate output directory,
 921 # and if so do:
 922 # 1) Check that make has not been executed in the kernel src $(srctree)
 923 # 2) Create the include2 directory, used for the second asm symlink
 924 prepare3: include/config/kernel.release
 925 ifneq ($(KBUILD_SRC),)
 926         @echo '  Using $(srctree) as source for kernel'
 927         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 928                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 929                 echo "  in the '$(srctree)' directory.";\
 930                 /bin/false; \
 931         fi;
 932         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 933         $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/errno.h ]; then  \
 934             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 935             fi
 936 endif
 937
 938 # prepare2 creates a makefile if using a separate output directory
 939 prepare2: prepare3 outputmakefile
 940
 941 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 942                    include/asm include/config/auto.conf
 943         $(cmd_crmodverdir)
 944
 945 archprepare: prepare1 scripts_basic
 946
 947 prepare0: archprepare FORCE
 948         $(Q)$(MAKE) $(build)=.
 949         $(Q)$(MAKE) $(build)=. missing-syscalls
 950
 951 # All the preparing..
 952 prepare: prepare0
 953
 954 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 955 # done in arch/$(ARCH)/kernel/Makefile
 956
 957 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 958
 959 # The asm symlink changes when $(ARCH) changes.
 960 # Detect this and ask user to run make mrproper
 961 define check-symlink
 962         set -e;                                                            \
 963         if [ -L include/asm ]; then                                        \
 964                 asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
 965                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
 966                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
 967                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
 968                         exit 1;                                            \
 969                 fi;                                                        \
 970         fi
 971 endef
 972
 973 # We create the target directory of the symlink if it does
 974 # not exist so the test in chack-symlink works and we have a
 975 # directory for generated filesas used by some architectures.
 976 define create-symlink
 977         if [ ! -L include/asm ]; then                                      \
 978                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';     \
 979                         if [ ! -d include/asm-$(SRCARCH) ]; then           \
 980                                 mkdir -p include/asm-$(SRCARCH);           \
 981                         fi;                                                \
 982                         ln -fsn asm-$(SRCARCH) $@;                         \
 983         fi
 984 endef
 985
 986 include/asm: FORCE
 987         $(Q)$(check-symlink)
 988         $(Q)$(create-symlink)
 989
 990 # Generate some files
 991 # ---------------------------------------------------------------------------
 992
 993 # KERNELRELEASE can change from a few different places, meaning version.h
 994 # needs to be updated, so this check is forced on all builds
 995
 996 uts_len := 64
 997 define filechk_utsrelease.h
 998         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 999           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1000           exit 1;                                                         \
1001         fi;                                                               \
1002         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1003 endef
1004
1005 define filechk_version.h
1006         (echo \#define LINUX_VERSION_CODE $(shell                             \
1007         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1008         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1009 endef
1010
1011 include/linux/version.h: $(srctree)/Makefile FORCE
1012         $(call filechk,version.h)
1013
1014 include/linux/utsrelease.h: include/config/kernel.release FORCE
1015         $(call filechk,utsrelease.h)
1016
1017 # ---------------------------------------------------------------------------
1018
1019 PHONY += depend dep
1020 depend dep:
1021         @echo '*** Warning: make $@ is unnecessary now.'
1022
1023 # ---------------------------------------------------------------------------
1024 # Firmware install
1025 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1026 export INSTALL_FW_PATH
1027
1028 PHONY += firmware_install
1029 firmware_install: FORCE
1030         @mkdir -p $(objtree)/firmware
1031         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1032
1033 # ---------------------------------------------------------------------------
1034 # Kernel headers
1035
1036 #Default location for installed headers
1037 export INSTALL_HDR_PATH = $(objtree)/usr
1038
1039 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1040 # Find out where the Kbuild file is located to support
1041 # arch/$(ARCH)/include/asm
1042 hdr-dir = $(strip                                                         \
1043           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1044                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1045
1046 # If we do an all arch process set dst to asm-$(hdr-arch)
1047 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1048
1049 PHONY += __headers
1050 __headers: include/linux/version.h scripts_basic FORCE
1051         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1052
1053 PHONY += headers_install_all
1054 headers_install_all:
1055         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1056
1057 PHONY += headers_install
1058 headers_install: __headers
1059         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1060         $(error Headers not exportable for the $(SRCARCH) architecture))
1061         $(Q)$(MAKE) $(hdr-inst)=include
1062         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1063
1064 PHONY += headers_check_all
1065 headers_check_all: headers_install_all
1066         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1067
1068 PHONY += headers_check
1069 headers_check: headers_install
1070         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1071         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1072
1073 # ---------------------------------------------------------------------------
1074 # Modules
1075
1076 ifdef CONFIG_MODULES
1077
1078 # By default, build modules as well
1079
1080 all: modules
1081
1082 #       Build modules
1083 #
1084 #       A module can be listed more than once in obj-m resulting in
1085 #       duplicate lines in modules.order files.  Those are removed
1086 #       using awk while concatenating to the final file.
1087
1088 PHONY += modules
1089 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1090         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1091         @echo '  Building modules, stage 2.';
1092         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1093         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1094
1095
1096 # Target to prepare building external modules
1097 PHONY += modules_prepare
1098 modules_prepare: prepare scripts
1099
1100 # Target to install modules
1101 PHONY += modules_install
1102 modules_install: _modinst_ _modinst_post
1103
1104 PHONY += _modinst_
1105 _modinst_:
1106         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1107                 echo "Warning: you may need to install module-init-tools"; \
1108                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1109                 sleep 1; \
1110         fi
1111         @rm -rf $(MODLIB)/kernel
1112         @rm -f $(MODLIB)/source
1113         @mkdir -p $(MODLIB)/kernel
1114         @ln -s $(srctree) $(MODLIB)/source
1115         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1116                 rm -f $(MODLIB)/build ; \
1117                 ln -s $(objtree) $(MODLIB)/build ; \
1118         fi
1119         @cp -f $(objtree)/modules.order $(MODLIB)/
1120         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1121
1122 # This depmod is only for convenience to give the initial
1123 # boot a modules.dep even before / is mounted read-write.  However the
1124 # boot script depmod is the master version.
1125 PHONY += _modinst_post
1126 _modinst_post: _modinst_
1127         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1128         $(call cmd,depmod)
1129
1130 else # CONFIG_MODULES
1131
1132 # Modules not configured
1133 # ---------------------------------------------------------------------------
1134
1135 modules modules_install: FORCE
1136         @echo
1137         @echo "The present kernel configuration has modules disabled."
1138         @echo "Type 'make config' and enable loadable module support."
1139         @echo "Then build a kernel with module support enabled."
1140         @echo
1141         @exit 1
1142
1143 endif # CONFIG_MODULES
1144
1145 ###
1146 # Cleaning is done on three levels.
1147 # make clean     Delete most generated files
1148 #                Leave enough to build external modules
1149 # make mrproper  Delete the current configuration, and all generated files
1150 # make distclean Remove editor backup files, patch leftover files and the like
1151
1152 # Directories & files removed with 'make clean'
1153 CLEAN_DIRS  += $(MODVERDIR)
1154 CLEAN_FILES +=  vmlinux System.map \
1155                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1156
1157 # Directories & files removed with 'make mrproper'
1158 MRPROPER_DIRS  += include/config include2 usr/include
1159 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1160                   include/linux/autoconf.h include/linux/version.h      \
1161                   include/linux/utsrelease.h                            \
1162                   include/linux/bounds.h include/asm*/asm-offsets.h     \
1163                   Module.symvers Module.markers tags TAGS cscope*
1164
1165 # clean - Delete most, but leave enough to build external modules
1166 #
1167 clean: rm-dirs  := $(CLEAN_DIRS)
1168 clean: rm-files := $(CLEAN_FILES)
1169 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1170
1171 PHONY += $(clean-dirs) clean archclean
1172 $(clean-dirs):
1173         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1174
1175 clean: archclean $(clean-dirs)
1176         $(call cmd,rmdirs)
1177         $(call cmd,rmfiles)
1178         @find . $(RCS_FIND_IGNORE) \
1179                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1180                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1181                 -o -name '*.symtypes' -o -name 'modules.order' \
1182                 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1183                 -type f -print | xargs rm -f
1184
1185 # mrproper - Delete all generated files, including .config
1186 #
1187 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1188 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1189 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1190
1191 PHONY += $(mrproper-dirs) mrproper archmrproper
1192 $(mrproper-dirs):
1193         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1194
1195 mrproper: clean archmrproper $(mrproper-dirs)
1196         $(call cmd,rmdirs)
1197         $(call cmd,rmfiles)
1198
1199 # distclean
1200 #
1201 PHONY += distclean
1202
1203 distclean: mrproper
1204         @find $(srctree) $(RCS_FIND_IGNORE) \
1205                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1206                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1207                 -o -name '.*.rej' -o -size 0 \
1208                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1209                 -type f -print | xargs rm -f
1210
1211
1212 # Packaging of the kernel to various formats
1213 # ---------------------------------------------------------------------------
1214 # rpm target kept for backward compatibility
1215 package-dir     := $(srctree)/scripts/package
1216
1217 %pkg: include/config/kernel.release FORCE
1218         $(Q)$(MAKE) $(build)=$(package-dir) $@
1219 rpm: include/config/kernel.release FORCE
1220         $(Q)$(MAKE) $(build)=$(package-dir) $@
1221
1222
1223 # Brief documentation of the typical targets used
1224 # ---------------------------------------------------------------------------
1225
1226 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1227 boards := $(notdir $(boards))
1228 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1229 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1230
1231 help:
1232         @echo  'Cleaning targets:'
1233         @echo  '  clean           - Remove most generated files but keep the config and'
1234         @echo  '                    enough build support to build external modules'
1235         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1236         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1237         @echo  ''
1238         @echo  'Configuration targets:'
1239         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1240         @echo  ''
1241         @echo  'Other generic targets:'
1242         @echo  '  all             - Build all targets marked with [*]'
1243         @echo  '* vmlinux         - Build the bare kernel'
1244         @echo  '* modules         - Build all modules'
1245         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1246         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1247         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1248         @echo  '  dir/            - Build all files in dir and below'
1249         @echo  '  dir/file.[ois]  - Build specified target only'
1250         @echo  '  dir/file.ko     - Build module including final link'
1251         @echo  '  prepare         - Set up for building external modules'
1252         @echo  '  tags/TAGS       - Generate tags file for editors'
1253         @echo  '  cscope          - Generate cscope index'
1254         @echo  '  kernelrelease   - Output the release version string'
1255         @echo  '  kernelversion   - Output the version stored in Makefile'
1256         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1257          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1258          echo  ''
1259         @echo  'Static analysers'
1260         @echo  '  checkstack      - Generate a list of stack hogs'
1261         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1262         @echo  '  versioncheck    - Sanity check on version.h usage'
1263         @echo  '  includecheck    - Check for duplicate included header files'
1264         @echo  '  export_report   - List the usages of all exported symbols'
1265         @echo  '  headers_check   - Sanity check on exported headers'; \
1266          echo  ''
1267         @echo  'Kernel packaging:'
1268         @$(MAKE) $(build)=$(package-dir) help
1269         @echo  ''
1270         @echo  'Documentation targets:'
1271         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1272         @echo  ''
1273         @echo  'Architecture specific targets ($(SRCARCH)):'
1274         @$(if $(archhelp),$(archhelp),\
1275                 echo '  No architecture specific help defined for $(SRCARCH)')
1276         @echo  ''
1277         @$(if $(boards), \
1278                 $(foreach b, $(boards), \
1279                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1280                 echo '')
1281         @$(if $(board-dirs), \
1282                 $(foreach b, $(board-dirs), \
1283                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1284                 printf "  %-16s - Show all of the above\\n" help-boards; \
1285                 echo '')
1286
1287         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1288         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1289         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1290         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1291         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1292         @echo  ''
1293         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1294         @echo  'For further info see the ./README file'
1295
1296
1297 help-board-dirs := $(addprefix help-,$(board-dirs))
1298
1299 help-boards: $(help-board-dirs)
1300
1301 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1302
1303 $(help-board-dirs): help-%:
1304         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1305         @$(if $(boards-per-dir), \
1306                 $(foreach b, $(boards-per-dir), \
1307                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1308                 echo '')
1309
1310
1311 # Documentation targets
1312 # ---------------------------------------------------------------------------
1313 %docs: scripts_basic FORCE
1314         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1315
1316 else # KBUILD_EXTMOD
1317
1318 ###
1319 # External module support.
1320 # When building external modules the kernel used as basis is considered
1321 # read-only, and no consistency checks are made and the make
1322 # system is not used on the basis kernel. If updates are required
1323 # in the basis kernel ordinary make commands (without M=...) must
1324 # be used.
1325 #
1326 # The following are the only valid targets when building external
1327 # modules.
1328 # make M=dir clean     Delete all automatically generated files
1329 # make M=dir modules   Make all modules in specified dir
1330 # make M=dir           Same as 'make M=dir modules'
1331 # make M=dir modules_install
1332 #                      Install the modules built in the module directory
1333 #                      Assumes install directory is already created
1334
1335 # We are always building modules
1336 KBUILD_MODULES := 1
1337 PHONY += crmodverdir
1338 crmodverdir:
1339         $(cmd_crmodverdir)
1340
1341 PHONY += $(objtree)/Module.symvers
1342 $(objtree)/Module.symvers:
1343         @test -e $(objtree)/Module.symvers || ( \
1344         echo; \
1345         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1346         echo "           is missing; modules will have no dependencies and modversions."; \
1347         echo )
1348
1349 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1350 PHONY += $(module-dirs) modules
1351 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1352         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1353
1354 modules: $(module-dirs)
1355         @echo '  Building modules, stage 2.';
1356         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1357
1358 PHONY += modules_install
1359 modules_install: _emodinst_ _emodinst_post
1360
1361 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1362 PHONY += _emodinst_
1363 _emodinst_:
1364         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1365         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1366
1367 PHONY += _emodinst_post
1368 _emodinst_post: _emodinst_
1369         $(call cmd,depmod)
1370
1371 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1372
1373 PHONY += $(clean-dirs) clean
1374 $(clean-dirs):
1375         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1376
1377 clean:  rm-dirs := $(MODVERDIR)
1378 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1379 clean: $(clean-dirs)
1380         $(call cmd,rmdirs)
1381         $(call cmd,rmfiles)
1382         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1383                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1384                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1385                 -type f -print | xargs rm -f
1386
1387 help:
1388         @echo  '  Building external modules.'
1389         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1390         @echo  ''
1391         @echo  '  modules         - default target, build the module(s)'
1392         @echo  '  modules_install - install the module'
1393         @echo  '  clean           - remove generated files in module directory only'
1394         @echo  ''
1395
1396 # Dummies...
1397 PHONY += prepare scripts
1398 prepare: ;
1399 scripts: ;
1400 endif # KBUILD_EXTMOD
1401
1402 # Generate tags for editors
1403 # ---------------------------------------------------------------------------
1404
1405 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1406 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1407 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1408
1409 ifeq ($(src),$(obj))
1410 __srctree =
1411 else
1412 __srctree = $(srctree)/
1413 endif
1414
1415 ifeq ($(ALLSOURCE_ARCHS),)
1416 ifeq ($(ARCH),um)
1417 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1418 else
1419 ALLINCLUDE_ARCHS := $(SRCARCH)
1420 endif
1421 else
1422 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1423 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1424 endif
1425
1426 ALLSOURCE_ARCHS := $(SRCARCH)
1427
1428 define find-sources
1429         ( for arch in $(ALLSOURCE_ARCHS) ; do \
1430                find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1431                     -name $1 -print; \
1432           done ; \
1433           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1434                -name $1 -print; \
1435           find $(__srctree)include $(RCS_FIND_IGNORE) \
1436                \( -name config -o -name 'asm-*' \) -prune \
1437                -o -name $1 -print; \
1438           for arch in $(ALLINCLUDE_ARCHS) ; do \
1439                test -e $(__srctree)include/asm-$${arch} && \
1440                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1441                     -name $1 -print; \
1442                test -e $(__srctree)arch/$${arch}/include/asm && \
1443                  find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1444                     -name $1 -print; \
1445           done ; \
1446           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1447                -name $1 -print; \
1448           find $(__srctree) $(RCS_FIND_IGNORE) \
1449                \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1450                -name $1 -print; \
1451           )
1452 endef
1453
1454 define all-sources
1455         $(call find-sources,'*.[chS]')
1456 endef
1457 define all-kconfigs
1458         $(call find-sources,'Kconfig*')
1459 endef
1460 define all-defconfigs
1461         $(call find-sources,'defconfig')
1462 endef
1463
1464 define xtags
1465         if $1 --version 2>&1 | grep -iq exuberant; then \
1466             $(all-sources) | xargs $1 -a \
1467                 -I __initdata,__exitdata,__acquires,__releases \
1468                 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1469                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1470                 --extra=+f --c-kinds=+px \
1471                 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1472             $(all-kconfigs) | xargs $1 -a \
1473                 --langdef=kconfig \
1474                 --language-force=kconfig \
1475                 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1476             $(all-defconfigs) | xargs -r $1 -a \
1477                 --langdef=dotconfig \
1478                 --language-force=dotconfig \
1479                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1480         elif $1 --version 2>&1 | grep -iq emacs; then \
1481             $(all-sources) | xargs $1 -a; \
1482             $(all-kconfigs) | xargs $1 -a \
1483                 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1484             $(all-defconfigs) | xargs -r $1 -a \
1485                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1486         else \
1487             $(all-sources) | xargs $1 -a; \
1488         fi
1489 endef
1490
1491 quiet_cmd_cscope-file = FILELST cscope.files
1492       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1493
1494 quiet_cmd_cscope = MAKE    cscope.out
1495       cmd_cscope = cscope -b
1496
1497 cscope: FORCE
1498         $(call cmd,cscope-file)
1499         $(call cmd,cscope)
1500
1501 quiet_cmd_TAGS = MAKE   $@
1502 define cmd_TAGS
1503         rm -f $@; \
1504         $(call xtags,etags)
1505 endef
1506
1507 TAGS: FORCE
1508         $(call cmd,TAGS)
1509
1510 quiet_cmd_tags = MAKE   $@
1511 define cmd_tags
1512         rm -f $@; \
1513         $(call xtags,ctags)
1514 endef
1515
1516 tags: FORCE
1517         $(call cmd,tags)
1518
1519
1520 # Scripts to check various things for consistency
1521 # ---------------------------------------------------------------------------
1522
1523 includecheck:
1524         find * $(RCS_FIND_IGNORE) \
1525                 -name '*.[hcS]' -type f -print | sort \
1526                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1527
1528 versioncheck:
1529         find * $(RCS_FIND_IGNORE) \
1530                 -name '*.[hcS]' -type f -print | sort \
1531                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1532
1533 namespacecheck:
1534         $(PERL) $(srctree)/scripts/namespace.pl
1535
1536 export_report:
1537         $(PERL) $(srctree)/scripts/export_report.pl
1538
1539 endif #ifeq ($(config-targets),1)
1540 endif #ifeq ($(mixed-targets),1)
1541
1542 PHONY += checkstack kernelrelease kernelversion
1543
1544 # UML needs a little special treatment here.  It wants to use the host
1545 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1546 # else wants $(ARCH), including people doing cross-builds, which means
1547 # that $(SUBARCH) doesn't work here.
1548 ifeq ($(ARCH), um)
1549 CHECKSTACK_ARCH := $(SUBARCH)
1550 else
1551 CHECKSTACK_ARCH := $(ARCH)
1552 endif
1553 checkstack:
1554         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1555         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1556
1557 kernelrelease:
1558         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1559         $(error kernelrelease not valid - run 'make prepare' to update it))
1560 kernelversion:
1561         @echo $(KERNELVERSION)
1562
1563 # Single targets
1564 # ---------------------------------------------------------------------------
1565 # Single targets are compatible with:
1566 # - build with mixed source and output
1567 # - build with separate output dir 'make O=...'
1568 # - external modules
1569 #
1570 #  target-dir => where to store outputfile
1571 #  build-dir  => directory in kernel source tree to use
1572
1573 ifeq ($(KBUILD_EXTMOD),)
1574         build-dir  = $(patsubst %/,%,$(dir $@))
1575         target-dir = $(dir $@)
1576 else
1577         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1578         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1579         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1580 endif
1581
1582 %.s: %.c prepare scripts FORCE
1583         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1584 %.i: %.c prepare scripts FORCE
1585         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1586 %.o: %.c prepare scripts FORCE
1587         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1588 %.lst: %.c prepare scripts FORCE
1589         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1590 %.s: %.S prepare scripts FORCE
1591         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1592 %.o: %.S prepare scripts FORCE
1593         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1594 %.symtypes: %.c prepare scripts FORCE
1595         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1596
1597 # Modules
1598 / %/: prepare scripts FORCE
1599         $(cmd_crmodverdir)
1600         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1601         $(build)=$(build-dir)
1602 %.ko: prepare scripts FORCE
1603         $(cmd_crmodverdir)
1604         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1605         $(build)=$(build-dir) $(@:.ko=.o)
1606         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1607
1608 # FIXME Should go into a make.lib or something
1609 # ===========================================================================
1610
1611 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1612       cmd_rmdirs = rm -rf $(rm-dirs)
1613
1614 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1615       cmd_rmfiles = rm -f $(rm-files)
1616
1617 # Run depmod only if we have System.map and depmod is executable
1618 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1619       cmd_depmod = \
1620         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1621                 $(DEPMOD) -ae -F System.map                                     \
1622                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
1623                 $(KERNELRELEASE);                                               \
1624         fi
1625
1626 # Create temporary dir for module support files
1627 # clean it up only when building all modules
1628 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1629                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1630
1631 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1632           $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1633           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1634
1635 quiet_cmd_as_o_S = AS      $@
1636 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1637
1638 # read all saved command lines
1639
1640 targets := $(wildcard $(sort $(targets)))
1641 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1642
1643 ifneq ($(cmd_files),)
1644   $(cmd_files): ;       # Do not try to update included dependency files
1645   include $(cmd_files)
1646 endif
1647
1648 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1649 # Usage:
1650 # $(Q)$(MAKE) $(clean)=dir
1651 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1652
1653 endif   # skip-makefile
1654
1655 PHONY += FORCE
1656 FORCE:
1657
1658 # Declare the contents of the .PHONY variable as phony.  We keep that
1659 # information in a variable se we can use it in if_changed and friends.
1660 .PHONY: $(PHONY)